Please follow the below steps to add a reference to an assembly
Close ArthaChitra (if it is running)
Copy the dynamic link library (DLL) in ANY ONE of the following folders:
In the folder '<My Documents>\ArthaChitra 2\SharpScript\' or
Installation folder of ArthaChitra. The typical installation folder in a 64bit environment is 'C:\Program Files (x86)\ArthaChitra 2\' and in a 32bit environment is 'C:\Program Files\ArthaChitra 2\'
Start ArthaChitra and in Main View goto New > Sharp Script Editor
In the Sharp Script Editor View click on the Reference menu item in the toolbar
In the Reference View click on the Add button
In the Select file dialog select the assembly you want to refer and click on Ok